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Ubuntu 12.4 and XP on Seperate Drives, Dual Boot, How?

I've never used Linux before in any form, but was always intrigued, so after a while of deciding whether to risk it I installed Ubuntu 12.04

During the installation I was asked "what would you like to do?" Install Ubuntu as the only operating system, alongside another os, or something else.

I chose something else as I wanted to format one of my old 100Gb IDE drives to serve as the partition to install ubuntu on. I formatted this drive with ext4 and made it the root directory for the installation, all ok.

I also have on a 1Tb SATA drive two partitions (splitting the disk in 2) one of these contains windows 7 and I did nothing to this drive (and was careful to do so)

After the installation finished the computer restarted and gave me no option for choosing operating systems?

what have I done wrong how can this be fixed? I would still like to be able to use Win7 for gaming.

Any help on this matter would be greatly appreciated. :)