PS3 dev cotojestwtf who is also known as cotojwtf has updated his YAB (Yet Another Bypass) tool delivering v1.3. YAB lets EU PS3 consoles running Official Firmware 4.00 to bypass the 4.10 update and gives acces for download. Developer bcklzz realesed some important news that will help you make this tool compatible with your US PS3 consoles which you can read below. THIS DOES NOT WORK FOR JB or CFW PS3s!!! Be sure to check the readme file as it contains important notes.
"How To - Work for US Region
Originally Posted by bcklzz
First, Thanks cotojestwtf.
in the rar there is only the ps3_updatelist.txt file for EU (that's Europe)
Most likely all the whiners are using US ps3.
So.
Make a copy of the folder in (and its contents)
configbypassfileUPDATEPS3LISTEU
to
configbypassfileUPDATEPS3LISTUS
and change the content of the file
ps3-updatelist.txt to
# US
Dest=84;CompatibleSystemSoftwareVersion=4.0000-;
Dest=84;ImageVersion=0000d18a;SystemSoftwareVersio n=4.000;CDN=http://dus01.ps3.update.playstation.net/update/ps3/image/us/2011_1130_52419374ba45a3d4a2b2dface2594140/PS3UPDAT.PUP;CDN_Timeout=30;
and that's all. start YAB, configure your PS3 to use the proxy and enjoy your PSN without upgrading to 4.10."
Source: http://www.ps3hax.net/2012/02/releaseyet-another-bypass-1-3/