I find a useful script from xda which will increase the internal memory of the device n the best thing is,
ITS UNIVERSAL....
It will work on any device n any rom which has root access n init.d support...
I m just sharing work of user croniccorey from xda, all credits to him...n please thank him too on xda..here is the link for original thread.
[SCRIPTS]CronMod-A2SD/D2EXT/INT2EXT (updated 08/06) - xda-developers

Devs can also use theses scripts to their roms provided they give proper credits to the creator of the scripts on their respective rom thread.

I have tested INT2EXT+ script on my own port from another device as its the best option among the all scripts.The dev also recommend it n I also recommend it.

INT2EXT scripts are new and faster then D2EXT, They are also the first universal INT2EXT method released

Spoiler

CAUTION:
You will loose your IMEI numbers after using the script...n possibly other NVRAM related data too...

EDIT(12/8/12, 23:32):
Now here I come in action again, I have modded the original INT2EXT+ script and solved that IMEI n nvram related bugs...I will share here my modded scripts only, for original scripts go to the original thread.
Other script will be modded on demand.

PRE-REQUISITES:
1) Rooted rom with init.d support
2) sd-ext partition

FEATURES:

INT2EXT+
-Mounts /sd-ext to /data
-Leaves /data/data on internal for speed
-Works with EXT 2/3/4 filesystems
-ZipAligns /data/app on every boot
-No symlinks
-First universal INT2EXT method

INT2EXT+deodexed
-Mounts /sd-ext to /data
-Leaves /data/dalvik-cache on internal for speed
-Works with EXT 2/3/4 filesystems
-ZipAligns /data/app on every boot
-No symlinks
-First universal INT2EXT method

DOWNLOADS:
I will share my modded script only, for original scripts go to original thread on xda, link above.

1) INT2EXT+_Mastermind.zip (IMEI n nvram related bugs fixed, reboot after 1st boot to get IMEI)
2) INT2EXT+deodexed_Mastermind.zip (for people facing slow system after using INT2EXT+ script)

HOW TO INSTALL:
(Instructions based on ClockWorkMod recovery)
-Download Appropriate Script Below
-Place on root of your sdcard
-Reboot Recovery
-Select "install zip from sdcard"
-Select "choose zip from sdcard"
-Select "CronMod-****_signed" (Flashable script zip)
-Select "mounts and storage" category
-Select "format /sd-ext"
-Reboot

Additional Notes:
- After flashing n reboot u may not get network, don't worry, just give device some time to boot completely then reboot, u will get back your network n IMEIs...


CREDITS:
- croniccorey from xda for the original scripts
- Thewraith420 for reporting bug on Virgin Mobile device


DISCLAIMER:
I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns before flashing! YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.

 

Changelog:

1) 12/8/12, 23:32
- Modded original INT2EXT+ script to fix IMEI n NVRAM related bugs (bugs fixed)
- Link to modded script added to OP

2) 13/8/12, 21:36
- Reworked script for IMEI problem
- Updated link in OP

3) 17/8/12, 01:41
- New script released for deodexed roms to tackle slow system issue

4) 24/8/12, 18:12
- Updated script to fix IMEI n NVRAM related bugs on Virgin Mobile device

 

No idea but did u used it on heavily loaded data partition means lot of apps installed???
N ya, no other mountscripts should be there,if u were using link2sd then remove 11link2sd from init.d plus install-recovery.sh from /etc...n u will lose ur apps so better to factory reset after removing the scripts.
If u were on data2sd by me then remove same install-recovery.sh from /etc plus 01e2fsck, 02data2sd n any zipalign script also from init.d...
I never try that on heavily loaded data partition as I know empty data partition(or atleast minimal) is good for script on 1st run, take less time to move contents to new partitions...

 

The script can handle heavily loaded data partition but reason of ur bootloop is Link2SD...u need to completely remove link2sd...the scripts i mentioned.this will make ur apps useless as u have linked them...so instead lending into trouble i would suggest to backup ur apps using titanium and factory reset...then try the script...

@ALL
SCRIPT HAS BEEN CHANGED LITTLE BIT TO SOLVE IMEI PROBLEM, DOWNLOAD NEW SCRIPT AGAIN...JUST UPLOADED NEW SCRIPT.
THANKS & SORRY FOR INCONVENIENCE.

 

masterminded..!!!!???? Lol...
Yes, I know the previous script also works fine but just get the newer one for future use...don't use old one again.