thank you for answer and help!
Sorry for any days delay, I'm busy at present!
YES I could confirm that system works properly now! I used the EASYBCD 2.0 (BETA). Only one issue came up - it was the new registration of existing XP software. I believe it was caused by the copy of NTLR...
it's my first contact to this forum and I hope to get a solution for my problem!
Here I have a PC system with a volume incl. XP (2 partitions). To use VISTA Ultimate 64 I add a installed a new volume (2 partitions).
Before installing this I removed the XP-volume to protect this.