UBCDv5rc1 works fine by itself on CD or USB drive, but when I add it to my multibootdisc using BCDW2.01a, it loads OK but then it jumps to the grub4dos menu from isolinux menu at startup.

FWIW here is the command I'm using to load UBCD from BCDW:
\boot\isolinux\isolinux.bin ; Ultimate Boot CD 5 RC1;; /boot/isolinux/menu.c32 APPEND /ubcd/menus/isolinux/main.cfg

does anybody have an idea how i can stop it going into the grub4dos menu

I never worked with BCDW and didn't try it, but you can try the following:

Just boot ISOLINUX (see that /boot/isolinux/isolinux.cfg exists):

Or try this command line, instead of the one you have:

I am not sure if BCDW will work with this last line. UBCD50RC1 uses a much recent version of ISOLINUX than the one available when BCDW was coded.
But I don't understand why it would boot grub4dos .

BTW, why are you still using BCDW?

_________________
Download Ultimate Boot CD v5.0: http://www.ultimatebootcd.com/download.html
Use Parted Magic for handling all partitioning task: http://partedmagic.com/

OK ,thanks, I'll give them a try when I get some time.

Umm, well I've had no reason to change. It does what i require to load BartPE, ERDC, UBCD, Lenovo Diags, various BIOS tools, and netbootdisks.
What do you suggest I use