custom grid option to product

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Hello everybody.
Can't find a solution. Have situation: standard product page grid(f.e. vertical) and alternative(horizontal). 10 of 15 elements should have standard grid and other 5 should have alternative. Want to implement this as a checkbox("Use alternative grid"?true:false). Can't understand how can I hook up products with alternative settings, to have 10 products with standart settings and 5 with alternative.
Appreciate for advices