Got a right one here guys, it's making me feel sick just looking at the pic the bride has produced...

Bride is having a 5 tier stacked cake. She wants a floral garland running down the entire length of one side of the cake, plus a posy on the top. Cakes are 6", 8", 10", 12" & 14". Top and bottom tiers are fake - made out of iced polystyrene, the 8 & 10 are madiera and the 12" is fruit. Flowers she is having are white hydrangea, sweet avalanche roses & white lissy, no foliage anywhere.

I just can't see how you could attach a full length floral garland to one side of the cake, the weight of the flowers & wire just wouldn't stay, even if you stabbed into the cakes. Does anyone have any tips or advice.....?