Found an OOO Driver and Birth Driver simulator from Masked Rider News.
OOO Driver
http://maskedridernews.blogspot.com/2010/12/20101223masked-rider-ooo-henshin.html
Like what you do with the real product you choose the medals and scan, scan them twice gives a Scanning Charge, no special Scanning Charge sound for Combo. Combo picture will appear when chosen. However, only the 4 Combos appeared have a good sound quality, the other sounds are taken from the toys. Purple medals are dino combo and yellow-brown medals are reptile combo.
Download the link in the blog, unzip file, click the .exe file
Birth Driver
http://maskedridernews.blogspot.com/2010/12/20110101happy-new-year-release-masked.html
This one is done a webpage instead. Download file, unzip it and choose the webpage.
Click a Cell Medal, then start scrolling your mouse DOWNWARDS. A cell medal will appear in the middle like the series do. Click the Cell Medal after scrolling. Different sounds will be activated according to where the Cell Medal in the middle is.
Top: Henshin sound
Top-right: Breast Cannon
Right: Caterpillar Leg
Bottom-right: Crane Arm
Bottom-left: Cutter Wing
Left: Drill Arm
Top-left: Shovel Arm
To activate Cell Burst, put two medals in instead of one, then start scrolling your mouse UPWARDS. Once you can hear the Cell Burst sound, click the Cell Medal in the middle and finishing sound will be activated.
The background for this is the picture on Maki's computer screen of Birth in Ep 14. And apparently the sounds came from the CSToys Review, you can hear the background music.
And I just made my blog as well, I'll usually put random stuff in it, including rumours, toy reviews, announcements and stuff made from myself:
http://kamen-rider-underground.blogspot.com/