installation - I couldn't install Ubuntu with "Something Else" option

The option Install Ubuntu alongside Windows 7 is not listed (I have 15GB free space in c drive).

In the "Something Else" option there are 4 drives listed:

• 1MB drive for windows loader



• 100MB drive (Windows)


• 30GB- c drive


• 45GB- else partitions.

Since there are 4 partitions, I cannot install Ubuntu (I cannot delete that 45GB since there are a lot of files in it).

If I shrink the C drive to install Ubuntu, even then I cannot make a partition for Ubuntu since there are 4 partitions.

If I remove that 1MB drive (which shows "Windows loader" next to it) and from the unallocated space I create 2 partitions (swap and ext4) and install Ubuntu, will this idea work??

Please help me to install Ubuntu.

--