How do I give less memory to my boot camp and more to my Mac HD?

Question

I had a friend set up my Bootcamp for me.  (He is great with this type of thing and I had no clue.)  I used to have a job where I needed to use Windows to run my work program.  So he gave a certain amount of my memory to that and left a certain amount for my Mac HD.  However, I no longer have that job and I am only using my Bootcamp to run one Windows program.  I rarely use it but still need it. 
I now want to make it so that I have more memory on my Mac HD and less on the Bootcamp.  If anyone can tell me how to do that it would be so greatly appreciated!  Thanks in advance!
I have a MacBook running Lion 10.7.3.  Processor 2 Ghz Intel Core 2 Duo, Memory 4 GB 1067 MHz DDR3.  Here is some information from the System information if it is helpful:
Volumes:
disk0s1:
  Capacity:    209.7 MB (209,715,200 bytes)
  BSD Name:    disk0s1
  Content:    EFI
Macintosh HD:
  Capacity:    132.5 GB (132,495,007,744 bytes)
  Available:    1.62 GB (1,618,046,976 bytes)
  Writable:    Yes
  File System:    Journaled HFS+
  BSD Name:    disk0s2
  Mount Point:    /
  Content:    Apple_HFS
Recovery HD:
  Capacity:    650 MB (650,006,528 bytes)
  BSD Name:    disk0s3
  Content:    Apple_Boot
BOOTCAMP:
  Capacity:    26.69 GB (26,686,259,200 bytes)
  Available:    9.36 GB (9,356,976,128 bytes)
  Writable:    No
  File System:    NTFS
  BSD Name:    disk0s4
  Mount Point:    /Volumes/BOOTCAMP
  Content:    Microsoft Basic Data

Answer 1

The only other way is to erase the Windows partition and start over.
You have about the bare minimum partition size for Windows with 26 gigs now so a few extra taken back wouldn't really help much. You only have 9 gigs free space available so in theory you could only take away 6 gigs or so and still leave enough room for the OS to work.
You need to have an extra 15%~ of extra space (on any OS) for any updates or installers to expand and install the software, they could take up to twice to three times as much room to expand from the original installer file.
If you need more room then you may want to look at maybe a larger main HD, (especially if it's the original drive, gettin old) an external HD or even a USB stick for the extra room you need. A 32 gig USB thumb drive is around $30 now, (on sale) way more capacity then you would get back from the trouble of repartitioning.
My 2 cents worth anyway........