Also you will first have to look at your partitions,you can use gparted which can be found on most live distros and my favourite Parted magic.
You only have four primary partitions and I suspect windoze 7 may be using three of them so you will have to turn the last partition into an extended,then you can add a logical swap and a / partition,since this is your first attempt is probably better to keep it simple but if you feel up to it you can add further partitions like home or whatever.
The swap will be found by the installer and when its asks you for the mount point you can insert what gparted has named for your / partiton,extended partitions start at 4,so its likely that if you make the swap first it will be something like sda5 and your mount point will be sda5,but gparted will confirm this,so write it down on your bit of paper...
You can actually install it all on just one partition and if you have bags of RAM you can even do it without the swap but a swap is recommended.
Once you have sorted out the partitions and checked the media you are using for defects you are ready to start the installation,some folks can get away with just hitting the enter button as the installer already has a default value but I think its better to have an idea of what its asking for because sometimes it not quite right... good luck and welcome to LQ LOL
ps you may also have to shrink windoze to free up some space if its hogging the whole drive,you may have to do some RTFM regarding the whole process if you want to maximise you chances of success.
Last edited by hughetorrance; 09-01-2010 at 12:54 PM.