Interesting, the link works for me. How about this link: Dev-Host.org - The Ultimate Free File Hosting / File Sharing Service
And yes, as a Straight Talk user, you use CDMA. Another way of telling what type of phone you have is if you have a SIM card. CDMA phones do not use SIM cards (at least, not until we get LTE) and the HBOOT are solid numbers (1.30, 1.40, 1.50). GSM phones use SIM cards and have 1.49.00XX bootloaders.
Flashing the phone over to Straight Talk will not be changed when you flash the ROM. The info you use to link with Straight Talk is contained in another part of your phone that isn't linked to ROMs or kernels.