need to uninstall?

I have EasyBCD tripple booting Ubuntu 10.04 Win7 and WinXP but now I want to
upgrade Ubuntu. I'm afraid that this will cause troubles to booting and loose the MBR
that EasyBCD has written to. If I put the "timout" option of grub to 10 should it give control
back to Ubuntu and after updating reconfigure EasyBCD, is this the right procedure?
thanks for any help