TCAD xp supports three develop tools :Delphi,C++Builder and Kylix.Please install the package by these steps:

1.Delphi

a.Run Delphi.
b.Select the File|Open menu option.
c.Choose the .dpk file.
d.Press "Install" button.
e.After you have installed package and start a new project, please make sure you've added package folder to your Delphi, C++ builder , Kylix's library path setting. 

2.C++Builder

a. Run C++Builder.
b. Select the File|Open Project menu option.
c. Select the .bpk file.
d. Press "Install" button.
e. After you have installed package and start a new project, please make sure you've added folder with the package folder to your C++Builder's library path setting and include directory.
Steps like this:
Projects->Options->Directories/Conditionals->Include path -> add "\TCADxp\Component\cbuilderX",Library path -> add "\TCADxp\Component\cbuilderX".
3.Kylix(Delphi)
a. Run Kylix Delphi.
b. Select the File|Open menu option.
c. Choose the bplCrystalComponentK3.dpk file.
d. Press "Install" button.
e. After you have installed package and start a new project, please make sure you've added package folder to your Kylix's library path setting.
4.Kylix(BCB)
a. Run Kylix BCB.
b. Select Component|Install Packages...
c. Click the Add... button.
d.Select the bplCrystalComponentK3.so file.
e. Click the OK button. when you first use run application with TCAD,it'll show a dialog let you choose hpp file,locate the Install directory,choose the cad.hpp file,click OK button,it runs.