EDIT2: Deleted PEGGY's 5493 hair because Peggy has already converted it & it's better than this version of course. It's available for females as well.
Delete this file:

PeggyHair5493CONbyYagiTeenYAAdultElder.package

Here's the link.

http://www.peggyzone.com/Sims3Detail.html?id=000063&sortId=00

EDIT2: Deleted PEGGY's 5371 hair because Peggy has already converted it & it's better than this version of course. It's available for females as well.
Delete this file:

PeggyHair5371CONbyYagiTeenYAAdultElder.package

Here's the link.

http://www.peggyzone.com/Sims3Detail.html?id=000057&sortId=00

EDIT: Deleted NEWSEA's hair because Newsea has already converted them & it's for all ages.
It can be found here.

http://hi.baidu.com/juiceshine/blog/item/6c2b71c649ee77d5d00060a6.html

Thank you Kayleigh. for letting me know. My bad.
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Hello everyone.
I really liked this hairs but Yagi, who converted them from TS2 to TS3, just made them available for Young Adults. How unfair.
So I decided to... Hmm I guess converting them is not the exactly word but it's something like that. Ok, It doesn't matter... what does is that these hairs are available for Teens, Adults & Elders too.
Poor Elders, always left behind. Not this time though.

Special thanks to Motoki. That tutorial really helped me.
Thanks to Krisan Thyme too. He helped me with an error that I was getting doing this.

Before downloading make sure you delete the Young Adult version from your downloads folder because this packages includes YA version as well as the others ages.
The file name for you to delete are:

CoolsimsAntoTS2C3_yagi.package

Ok then, let's start...

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COOLSIMS's hair


Teen.


Adult.


Elder.

http://www.mediafire.com/download.php?zyjnmmj4zaz

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It works in game, it doesn't crash nor anything bad.
If there's gaps I'm sorry but I didn't convert the hair from TS2 to TS3 so that's not my fault. Anyhow I don't know how to make meshes nor fix them obviously.
But don't worry, It's really good.

Have fun everyone.
I hope the thread doesn't cut.