PreLoader Brick?

If i install PreLoader on my 4.2E Wii (and has boot1) will it Fully-Brick my wii like it did a year ago? (SYstem Files Are COrrupted.....)

Scratch that....

How can i manually format my GC Memory Card because it's f**k up because when i use GCMM, it says Mem Mount Failure -3 or something, even NuGaSa doesnt restore OR backup and neither does Gamecube Saver