Can we upgrade our X300 6478-1TU with open-line 3G/HSPDA modem?

Question

I bought a Lenovo Thinkpad x300 (6478-1TU) in US and want to upgrade it with an embedded Sierra Wireless MC8775 PCI Express Mini Card specified in Lenovo's Hardware Manual which is compatible with the 3G GSM service provider system where I am based, in the Philippines.
I emailed Sierra Wireless to purchase this product but this is their reply:
Thank you for your inquiry.  Please note that our MC PCI express line of mini cards are embedded modules that are only available for integration into hardware applications, they are not available for end user purchases.  The MC cards we offer are not finished products, therefore cannot be put into regular PCI card slots.
In addition, all embedded slots on Laptops have a proprietary BIOS and cannot be re-provisioned by consumer, thus these would not work in your unit.  My suggestion is that you contact your Laptop manufacturer for alternate solutions.
This is very disappointing since I bought this laptop assuming the SIM Card slot by the battery can be used and just had to be upgraded by a 3G modem like the MC8775. I did not order the customized ones offered optional under Verizon or Cingular because these are locked to the respective providers only.
I am in the Philippines and want an open line modem for flexibility when travelling abroad. 
From the parts list:
http://www-307.ibm.com/pc/support/site.wss/MIGR-69​373.html
The location of the MC8775 (number 3) should be on the opposite side of the Intel Wireless WiFi Link 4965AGN (number 6) - Installation is back to back, I guess this is difficult to install but possible to do.
Is it true about the BIOS? Isnt there any BIOS upgrade or only a driver installation needed?
Can Lenovo assist us with this upgrade? I am willing to send my laptop to China, Siongapore or Hongkong or back to US if my laptop can have this embedded mini card. 
Solved!
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Answer 1

Lenovo has some awesome videos here which show you how to install parts. The hardware manual is also a very useful resource. The WWAN card is one of the easier to get at... but don't forget about the antenna! I have no idea what antenna is pre-installed in your system. If you remove the keyboard, as in the videos, you should see your WWAN slot and any pre-installed antenna. If there is a WWAN antenna there, you are golden. It is possible to retrofit an antenna, but it is tricky. The LCD disassembly/reassembly video shows it.
The only guaranteed way to get WWAN would be to find a way to get Lenovo to do it. Doing it yourself, you take some risks. Your warranty becomes void. You may have problems with the installation. It may or may not work in the end.
Lastly, for everyone else reading this thread bananaman's WWAN rule:
If there is even just a tiny chance that you will ever use it, order your ThinkPad with WWAN factory-installed!
The incremental cost is only about +/-$100, depending on the model. In the current ThinkPad models, Retrofitting WWAN is not easy, not cheap, and risky.
That said, maybe someone out there who has actually done the retrofit can chime in with some advice...
I don't work for Lenovo. I'm a crazy volunteer!