This mod allows you to use the Mesmetron on Dr Li, allowing you to freely take her unique clothing and of course, sell her into slavery!
Best of all? This is all FULLY voiced with the usual mezzed person lines, voiced by Dr Li's ACTUAL voice actress! Ah, being a slaver has never felt so good.

Update features!
Shortly after uploading the original, I got an idea to make the mod better from a role-playing and immersion perspective...
This mod now allows Pinkerton to return to Rivet City as chief scientist, with a brand new schedule, after Dr Li's been enslaved and The Replicated Man has been completed.
Additionally, he will move into Dr Li's living quarters and her room door will be renamed 'Pinkerton's Door'; he also gets his own key for his new room.
His dialogue in 'The Wasteland Survivial Guide', should you do his portion of that quest after the above criteria is met, will be altered to reflect his new position. 

Notes:
*You will not actually 'fail' any quests by enslaving her.
*This mod will potentially break the main quest, so do not use it in a normal playthrough until after Li becomes irrelevant to the plot, after 'Picking Up the Trail'.
(I know she talks to you on the intercom in 'Take it Back!' but if you enslave her beforehand, well, we can dismiss that as a pre-recorded message, right?...) 
*You CAN freely use this in any alternate start playthrough in which you're not doing the main story, as Li serves as nothing more than a snotty, self-entitled bitch in that scenario, so feel free to send her packing to Paradise Falls!

Installation:
Extract files to your Fallout 3 data folder, activate the esp and you're good to go! Well, just make sure you have that mesmetron first! ;)