Go ahead and install
BBSAK and the lastest
OS for curve. Backup your contacts and whatever else u want using BBDM. I wouldnt do servicebooks or anything and just reset that up. Launch BBSAK and do a WIPE this will wipe os and everything off the device. Then after your BB show a error 507 on a white screen, click load os with BBSAK and follow the steps. In the following screen you can customize what you want and dont want on the device itself.
Hope this helps,
~mike