I suspect the problem may be your use of the Acronis OS Selector. The Grub boot manager should have been sufficient to let you choose which OS to load.
When I had a triple boot with 98SE, XP and SuSE Linux, Grub gave me the option to boot Linux or Windows. If I selected Windows, I then got XP's usual menu from which to select 98SE or XP. Linux seems to prefer to set everything up for itself.