This is for those who wants to use HtcRIE ( Htc Rom Image Editor )
as far as my knowledge its a simple tool from which u can remove the programs u dun want to use n save some memory..
Here are the steps to use it:-
1. Unzip the desired NRG ROM and if you want, unzip HTCrie into the same folder.
2. Then run HTCRie and do File > Open and select the RHODIMG.NBH file.
3. On the left panel, click the "+" next to OS to expand it.
4. Click on IMGFS. You'll see all the files in the ROM. You can sort by name, size, type. Highlight the files you want to delete (eg. MP3Trimmer, Palringo, etc) and hit the DEL key.
5. Click the Save icon when you're done.
6. Exit HTCRie and flash as usual.
orignal link to download it from..
htc ROM Image Editor and other Tools. (C) 2007-2009 AnDim (UPDATED 29.04.2009) - xda-developers