Here's how to get Clockworkmod recovery with SP Flash Tool:
1. Download SP Flash Tool
2. Download MT6573_Android_scatter.txt
file from here
3. Download a45recovery-cwm.img
4. Extract SPF Tool.zip and Run Flash_tool.exe
5. Click File->Open Scatter-loading file
and select the MT6573_Android_scatter.txt you downloaded.
6. Now uncheck everything except RECOVERY
. Click on recovery and select a45recovery-cwm.img
7. Now turn off your Micromax A45, remove battery and put it back(DONT switch it back on
8. Press Download in the SP Flash Tool window, then When the countdown starts, connect your phone to PC.
9. After it's done, disconnect the phone, remove battery and put it back. Boot the phone into Recovery mode, You should have Clockworkmod v18.104.22.168