Related culstom fields

[servlet]

Is it possible to create product with two or more custom fields which are depended each other (related). If it is not possible I will be the first who will buy this comercial extension.
Every product has material, size, package, and so on. First you need to select size then material, package.... If you select size you can select material with price based on size, and you can select package based on size again. Or the size is selected by default you can select other options related to this size.
It is needed field for colors. Colors must be displayed in drop down menu with color in each line. Colors must be inputed with RGB color code. Something like this http://breakdesigns.net/extensions/customfields-for-all but displayed in dropdown menu. Look at this sample for colored  http://ge.tt/5JYc3pG1/v/0

Simple exmp.

______[Size]- 100 cm X 100 cm
__________[Material]- wood
__________[Material]- metal +$10
__________[Material]- PVD + $15
__________[Package]- Carton + $2
__________[Package]- Plastic + $7

______[Size]- 120 cm X 150 cm + $30
__________[Material]- wood + $5
__________[Material]- metal + $15
__________[Material]- PVC + $45
__________[Package]- Carton + $4
__________[Package]- Plastic + $9