[syslinux] [pxelinux] load image from other TFTP servers?

[G. Nau]

We are using three different TFTP servers for special purposes 
besides the main one.
Is there a chance to load menu choosen images from the other 
servers or is it only possible from the tftp server, where the 
pxelinux.0 was loaded?
Most of the images are on the main machine, but for testing and 
special purposes we'd like to enter the label of the images, which 
has to be loaded from other tftp servers.
Of course this can be changed in the DHCP server, but that's not so 
good for maintenance reasons.

Regards
  Bernd