How to change VMWare read-only root to writeable

Still no success with my installation of macosx of any kind on my PC in VMWARE...still im trying different stuff

I noticed a problem on all of the tried installations: osx installer says at one point something like "root is read-only"...and gives a lot of mkdir errors (guess cant create directories due to read-only). I dont know why vmware makes the root read-only ...or anything i should do to change that . Any help?

I found on a wiki page something that was saying like this:

start install with -v -s , then there were some command: fdisk -e /disk0 ... i tried it but i dont think i used it right nothing happened...

Any help , especially with the read-only stuff would be most appreciated (i dont know if thats the problem , the read-only stuff, but i guess it could be).