yes you can - long as you are using the same kernel to which the nandroid backup was made to restore it and same file system
iv restored my cm7 nandroid backup after testing things on cm9 - its not a problem - you can do it on any rom if the above contition is met
you can do a format system data cache before hand if you like
#include /* * Your warranty is now void. * * 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 about features included in this ROM * before flashing it! 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. * * Submitting bug reports on nightly builds is the leading * cause of male impotence. */
First time installing CyanogenMod 9.1 to your Galaxy Y, or coming from another ROM:
CyanogenMod 9.1 Downloads:
If you're going to reuse our work, which we're doing for free, be fair and give proper credits.
adb logcat -v long > totorologcat.txt