this rom is solid!... so much so that i chose jerrys repo to build off of for my own personal enjoyment... as for the questions, since jerrys busy with new projects, i will chime in...
@orlin--- cyanogenmod settings>interface>choose a bootanimation (wait for the popup to confirm that it has been successful, sometimes it takes a while)...
or, use a root capeble file manager such as root browser or es file explorer, go to system>media, and delete the three that are there and paste the one youve chosen...
it must be mdpi (320x480)
@daniel--- sounds like a bad flash... use leslieanns easywipe.zip>flash BACKside>flash MRG666s latest kernel>flash gapps>flash theme (optional)>reboot...
http://forums.androidcentral.com/optimus-v-rooting-roms-hacks/164127-easy-wipe-zips.html
https://github.com/mrg666/android_kernel_thunderc/downloads
@jake--- the link posted above by hindolam is definately good info... as youve probably learnred by now, (noticed youre the last post in leslies guide), not all v's are created equal, some can oc some cant... more than likely youll be most stable at 480min/600max/interactive... youll have to experiment yourself to see what yours can/cant handle... the screen freezes could be an oc issue or simply the ics screen animations (cyanogenmod settings>display>screen-on/screen-off)... you could also uncheck 180 degree rotation...