just a question before i try and brick my psp ...
if I use sceNand... only to read is there a possibility to brick my psp ? (I guess not but better double check)
Other question : will sceNand be available if I run homebrew code in usermode through GTA hack ? I have a 2.01 psp so this is my only possibility to run hb code by now.
If you only use the sceNandRead* functions there is no danger. Obviously don't use sceNandWrite* or sceNandErase! Also, sceNandTestBlock() will erase the block in question so stay away from that as well!
sceNand obviously requires kernel access so no go on GTA exploit.