as the title says i cant unisntall any apps to free up space in rootfs any help would be greatly appricaited

If you've got rootsh installed, you can use "apt-get remove" from X Terminal to uninstall them (you'll need to know the actual package name though, rather than the display name). If you've been installing from the command-line, you might also find "apt-get clean" will free up some space.

i havent used comand lione to install and also dont know full package names would a reflash help and what info woud remain phone numbers texts etc

Try disabling extras-testing and extras-devel repo's to see if that frees up some memory. If that doesn't work, flashing would be the solution.

I could be wrong, but I think your phone goes back to factory state if you flash the emmc as well; flashing the firmware leaves the settings untouched.

so what would be my best bet with regards to flashing

If you're going to flash, might as well flash the phone back to factory state so you start with a clean slate.

Make a back up before flashing

i dealyy want to keep phone numbers texts music etc

disable extras and development repositories and reboot your n900. Uninstall softwares that you do not use.

ok things going from bad to worse suddenly i dont have any catalogs at all so cant disable any im thinking just reflashing the firmware would this help i have read that after flashing firmware people are left with there phone contacts etc still intact if this is the case then i shall reflash

really in need of help now as i cant even read a text as its saying its full