I want to run yahoo messenger in my mobile htc hd2

Your phone runs WM6.5, right? If so, here I go:
1) Some time ago, I uploaded the last version released by Skype prior to discontinuing support for WM. You can download it from this location.
2) Unfortunately, I don't have an Yahoo Messenger cab file to be installed on your phone. However, you can fire up an internet browser on your phone and type in 'web.im' in the address bar. You'll be prompted to log in to your Yahoo account. I have never tested this method, since I boarded the Android boat 9 months ago.
3) A long time ago, I posted these tips about syncing WM phones. Hope they might be useful to you, somehow.
Hope all of the above work for you.
Anyway, please, let me know if I can assist you any further.
Regards, Carlos

for htc desire download the SYNC software for the ANDROID DEVICE form here ;

http://www.htc.com/www/supportdownloadlist.aspx?p_id=312&act=sd&cat=all

install it and connect the phone with usb cable and run this app.

but if you have HD2 then,

for htc HD2 windows mobile : download the WMDC (windows mobile device center) for win7/vista PC or PC SYNC 4.5 for XP and install it to use your Windows phone 6.5 device.

Prerequisite to run Android 2.2 Froyo on HTC HD2

1. Flash HardSPL3 on HTC HD2
2. Flash any HTC HD2 Radio ROM Leo_RADIO 2.08 onward

Guide to install and run mattc Leo + Froyo w/Sense 1.7 build

1. Download zip file here.
2. Extract contents of zip file to your SD card. Note - Android folder should be located at root level (SD card\Android).
3. Using file explorer in Windows Mobile, inside the 'Android' folder run CLRCAD.exe (to fix audio issue). Don't worry, it will appear to do nothing, that is normal.
4. Run Haret.exe.
5. Enjoy...

Note - Android 2.2 Froyo on HTC HD2 is not perfect yet compare the actual Android phone HTC Desire. Some functions are not working. And I got white and black screen of death (SOD) sometimes. But it is getting better and better each day. Hoping it will out perform actual Android phone out there soon.

u cant download yahoo messenger to a mobile phone.u have to have internet to acces yahoo messenger

Check this llink for over all review of HTC HD2 smartphone
-->http://www.trustedreviews.com/mobile-phones/review/2009/11/07/HTC-HD2-Windows-Phone-Smartphone/p1
Thanks for rating Good luck

I have your solution my friend
just enter this link on your mobile browser

((((m.yahoo.com/messenger))))
download it save it and your done
i hope it was useful.....
note : the url or link without brackets

brew OS doesnot have too many developers but the in build java will run yahoo messenger
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i need yahoo massenger for my htc hd 2 if any body have kindly send it to me
Thanks!!!!

Well for your information microsoft wm 7 so far is not coming to Htc hd2. But if you want to enable the 567MB Ram then you have to flash your phone with the After market cooked roms. You can go on xda-developers.com and click on the forums choose Htc hd2 and then rom developments. If you need any futher help let me know thanks.