beginner's installation problem

[krishnaraj916]

I've downloaded the new linux mint 12 LISA from the torrent, and used a UNETBIn to convert the iso files into the ones required for booting up from a pen drive,But the problem is while conversion it shows options till mint 10, but still i loaded those files onto this pendrive to boot. The next time when i start to boot from it selecting option "USE MINT 12", it just hangs,...After couple of searches I figured out something like "-- acpi=off" (dunno what is it?)) must be added and it worked fine..during installation I used the partition as "ext2" and installed. After successful installation , I rebooted but then found that the boot menu doesn't appear!!:((
Please do help me, I am new to this:(

[jp734]

If you're talking about the grub boot menu, you can press and hold hte shift key while booting and it will show up. Mint doesn't show it by default.