NOTE: Given you do not have access to the keyboard during installation providing these might be problematic. You can try adding noapic and nolapic to the end of the linux boot command that's contained in your GRUBa config file on your USB.
Accessing the boot menu's config files
If you go poking around on your USB's installation media that you're using you'll notice the following directory structure.
$ ls -l total 570 -r--r--r--. 1 saml saml 25 Oct 13 16:59 autorun.inf lr-xr-xr-x. 1 saml saml 1 Oct 13 16:58 debian -> . dr-xr-xr-x. 1 saml saml 2048 Oct 13 16:58 dists dr-xr-xr-x. 1 saml saml 2048 Oct 13 16:57 firmware -r--r--r--. 1 saml saml 159629 Oct 13 16:59 g2ldr -r--r--r--. 1 saml saml 8192 Oct 13 16:59 g2ldr.mbr dr-xr-xr-x. 1 saml saml 2048 Oct 13 16:59 install dr-xr-xr-x. 1 saml saml 2048 Oct 13 16:58 isolinux dr-xr-xr-x. 1 saml saml 2048 Oct 13 16:58 live -r--r--r--. 1 saml saml 33392 Oct 13 16:59 md5sum.txt dr-xr-xr-x. 1 saml saml 2048 Oct 13 16:58 pool -r--r--r--. 1 saml saml 366350 Oct 13 16:59 setup.exe dr-xr-xr-x. 1 saml saml 2048 Oct 13 16:59 tools -r--r--r--. 1 saml saml 228 Oct 13 16:59 win32-loader.ini Take notice of the directory, isolinux, which contains the "Boot Menu" contents. Specifically look at the .cfg files.
$ more install.cfg label install menu label ^Install linux /install/vmlinuz initrd /install/initrd.gz append vga=788 -- quiet label installgui menu label ^Graphical install linux /install/gtk/vmlinuz initrd /install/gtk/initrd.gz append video=vesa:ywrap,mtrr vga=788 -- quiet Add these arguments to the end of the append line, noapic nolapic.
append vga=788 -- quiet noapic nolapic 