SEV: Planet Type and Colony tech

[Elsemeravin]

While waiting to get the full version (SEV), I'm having an idea using the demo and searching data files :

Setting the following in PlanetPhysicalTypes.txt:

Name := Solid Rock
Description :=
Picture Index := 2
Tech Area For Colonization := Native Solid Rock Planet Colonization

Name := Ice
Description :=
Picture Index := 1
Tech Area For Colonization := Native Ice Planet Colonization

Name := Gas Giant
Description :=
Picture Index := 3
Tech Area For Colonization := Native Gas Giant Colonization

Name := Flooded
Description :=
Picture Index := 1
Tech Area For Colonization := Native Flooded Planet Colonization

Name := Volcanic
Description :=
Picture Index := 1
Tech Area For Colonization := Native Volcanic Planet Colonization

Then the tech tree would have: the following requirement:

For the native colonization tech, a requirement making impossible to research (like have already level 1 in that tech or racial something necessary)

Then 5 Advanced colonization tech:

Advanced Solid Rock Planet Colonization
Requirement:
Native Solid Rock Planet Colonization >=1
OR Advanced Ice Planet Colonization >=3
OR Advanced Gas Giant Colonization >=9
OR Advanced Flooded Planet Colonization >=7
OR Advanced Volcanic Planet Colonization >=4

Advanced Ice Planet Colonization
Requirement:
Native Ice Planet Colonization >=1
OR Advanced Solid Rock Planet Colonization >=4
OR Advanced Gas Giant Colonization >=8
OR Advanced Flooded Planet Colonization >=3
OR Advanced Volcanic Planet Colonization >=9

Advanced Gas Giant Colonization
Requirement:
Native Gas Giant Colonization >=1
OR Advanced Solid Rock Planet Colonization >=9
OR Advanced Ice Planet Colonization >=9
OR Advanced Flooded Planet Colonization >=4
OR Advanced Volcanic Planet Colonization >=6

Advanced Flooded Planet Colonization
Requirement:
Native Flooded Planet Colonization >=1
OR Advanced Solid Rock Planet Colonization >=5
OR Advanced Ice Planet Colonization >=5
OR Advanced Gas Giant Colonization >=3
OR Advanced Volcanic Planet Colonization >=8

Advanced Volcanic Planet Colonization
Requirement:
Native Volcanic Planet Colonization >=1
OR Advanced Solid Rock Planet Colonization >=5
OR Advanced Ice Planet Colonization >=7
OR Advanced Gas Giant Colonization >=8
OR Advanced Flooded Planet Colonization >=7

This way everyone can research every colonization tech, but the kind of planet you choose determine the one would be able to colonize first.

2 Questions to people having the full version already or the beta tester (should I say beta modder?) around:
1] Can the restriction on native tech be easily possible ?
2] Can such "OR" combination made on the tech tree ?