Wanting to install a third OS on netbook

Hey guys. So I already have Windows XP SP3 install alongside Ubuntu 11.04 and was looking to add another install of either Win7 Pro or OS X 10.7 Lion. I have no idea where to start and if this is even possible on the same HDD that I am using for my current dual boot.

Here is a screenshot of my layout in Win XP (can do one on GParted on request)

http://i52.tinypic.com/2d78rk4.jpg
The first (NTFS) partition has XP installed on it and the other two are running linux.

Couldn't find out whether or not my netbook was compatible or not. Source:

Mac OS X Netbook Compatibility Chart

Here are the hardware spec's of my netbook:

Code:

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System Name: SAM-PC
[System Summary]

Item        Value       
OS Name        Microsoft Windows XP Professional       
Version        5.1.2600 Service Pack 3 Build 2600       
OS Manufacturer        Microsoft Corporation       
System Name        SAM-PC       
System Manufacturer        Packard Bell       
System Model        DOT SE       
System Type        X86-based PC       
Processor        x86 Family 6 Model 28 Stepping 10 GenuineIntel ~1496 Mhz       
BIOS Version/Date        Packard Bell V3.12(DDR3), 12/16/2010       
SMBIOS Version        2.6       
Windows Directory        D:\WINDOWS       
System Directory        D:\WINDOWS\system32       
Boot Device        \Device\HarddiskVolume1       
Locale        United States       
Hardware Abstraction Layer        Version = "5.1.2600.5512 (xpsp.080413-2111)"       
User Name        SAM-PC\Sam       
Time Zone        GMT Daylight Time       
Total Physical Memory        1,024.00 MB       
Available Physical Memory        343.07 MB       
Total Virtual Memory        2.00 GB       
Available Virtual Memory        1.96 GB       
Page File Space        2.38 GB       
Page File        D:\pagefile.sys

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Honestly have no idea where to start..any guidance would be very much appreciated.

Sam